Impeller



FIG. 1 is a perspective view of the impeller showing our new design;

FIG. 2 is a top view thereof:

FIG. 3 is a bottom view thereof;

FIG. 4 is side view thereof;

FIG. 5 is an opposing side view thereof;

FIG. 6 is an end thereof; and,

FIG. 7 is an opposing end view thereof.

The broken lines in the drawings illustrate the portions of the impeller that form no part of the claim. 

CLAIM The ornamental design for an impeller, as shown and described. 